I.Equipment Function

1. Select the original electric air conditioning system of BYD Seagull EV 305KM pure electric car (vehicle factory date May 2025 or later), install it on the bench without changing the relative layout of the original vehicle, and intuitively recognize the main components such as electric compressor, PTC heating module, air conditioning evaporator, air conditioning expansion valve, etc.; the low-voltage control line and high-voltage power line are original parts, the length is increased, the high-voltage power line is orange, with a protective bellows, and a warning mark is added at the connection. It is strictly forbidden to plug or unplug any high-voltage power line when the power is on; so that students can quickly understand the composition and connection relationship of the components of the electric air conditioning system training.
2. The electric compressor driven by the air conditioning driver extracts the gaseous refrigerant from the evaporator and presses it into the condenser; the high-pressure gaseous refrigerant liquefies when passing through the condenser and performs heat exchange (releasing heat), and the heat is taken away by the air outside the car. The high-pressure liquid refrigerant is depressurized by the throttling effect of the expansion valve, and the low-pressure liquid refrigerant is vaporized in the evaporator to exchange heat (absorb heat). The cooled air near the evaporator is blown into the car through the blower. The gaseous refrigerant is then extracted by the compressor and pumped into the condenser, so that the refrigerant is circulated in a closed manner, continuously discharging the heat in the car to the outside of the car, and reducing the temperature in the car to a suitable temperature; the test bench displays the pressure values of the high-pressure and low-pressure ends during operation through special pipelines and instruments, so that students can intuitively recognize the characteristics of high and low pressure pipeline changes.
3. The training platform is equipped with a teaching board, which fully displays the working principle diagram of the air conditioning and heating system, and is equipped with detection terminals, with no less than 60 detection terminals. With the help of tools such as multi-meters, parameter changes under various states can be detected in real time; the length of the teaching board is not less than 1600mm, which can meet the needs of 2 students to test and learn in different parts at the same time.
4. The training table consists of a platform and a teaching board; the platform is placed horizontally and the main components are installed; four casters, two universal wheels and two directional wheels are installed at the bottom of the platform, which are flexible to move. At the same time, the universal casters are equipped with self-locking devices to fix the position; the casters have low rolling resistance, are quiet and wear-resistant.
5. The training table is also equipped with a mainstream electric vehicle air-conditioning compressor, which is displayed in a split-cut manner to clearly understand the internal structure and working mode of the electric air-conditioning compressor of the refrigeration system, and the teaching board draws the working principle of the electric air-conditioning refrigeration system.
6. The cooling fan and water tank are installed in front of the bench, the same as the actual vehicle position, and the hot air blown out at the same time will not cause harm to the trainee's operation.
7. Equipped with a intelligent fault setting and assessment system, through the Tablet WIFI wireless setting, the teacher sets the fault, the trainee analyzes and finds the fault point, and masters the real vehicle fault handling ability; the wireless fault setting is not less than 10 points, divided into circuit break, occasional and other phenomena.
8. Equipped with manuals consistent with the bench training project.
9. Equipped with a clamp meter and a high-voltage test pen for new energy vehicles, which are used to control the line voltage, current and other parameters and the contactless measurement of the orange high-voltage circuit and high current.
10. The base frame of the training platform is welded with alloy steel profiles, which is strong and reliable. The main material size is not less than 40*40mm; the main profiles on both sides of the front are semi-circular bending transition, and the upper front and rear are protected by stainless steel handrails to prevent students from getting hurt.